Halloween will be here before we know it, so I’ve put together a collection of my Top 10 Science Experiments for Halloween to celebrate. There’s a spooky lava lamp, creepy shadow puppets, fizzy witch and wizard potions and even a noise making machine!
Print off the list below and tick each science activity off as you go along. Which will you try first?
Top 10 Science Activities for Halloween
1. Spooky Lava Lamp
Lave lamps also feature in my Top 10 Science Experiments Every Child Should Try at Least Once. They are super easy to set up and can be used over and over again.
Pumpkin themed lava lamps always make me smile and make an unusual window decoration as well as a fun science activity.
2. Creepy Shadow Puppets
Shadow puppets are another very easy activity and can be made fun for older children by adding coloured cellophane for extra effect.
3. Witchy Potions
My collection of fizzy and slimy potions is great for this time of year and perfect for little witches and wizards. Who doesn’t love a fizzy witchy brew?
You can use red cabbage indicator to make a colour-changing potion and baking soda and vinegar to make it fizz!
4. Scary Giant Sweets
Place leftover Halloween candy jelly sweets in clean water and watch them expand over a few hours as they absorb the water.
5. Bug Filled Ice
Ice excavations are easy and inexpensive to set up. Younger children usually enjoy dripping warm water over the top to melt the ice, while older children can try adding salt ( take care, this can make the ice extra cold ) and investigate how the salt speeds up the melting process.
7. Erupting Pumpkins
You’ve probably made an erupting volcano before, but a pumpkin ( once you’ve scooped out the delicious insides ) can be erupted too!
8. Ghostly Optical Illusions
These are actually pumpkin illusions, but a ghost would also look great.
9. Nasty Noise Maker
All you need to make spooky noises is a plastic cup, ribbon and a paperclip! If you pair this up with creepy shadow puppets, you have a great trick for trick-or-treaters!
10. Magic Mirror Writing
Write creepy messages backwards using a mirror to help!
Which of my Top 10 Science Experiments for Halloween is your favourite?
More Halloween ideas for kids
My brand-new book is perfect for Halloween and is available to preorder now! Gross Science is jam-packed full of icky, sticky and slimy science for kids! Make jelly scabs, fake poo, a blood cocktail and lots more!
If you’d rather something more autumnal, take a look at my easy Autumn STEM Challenges.
Last Updated on October 6, 2023 by Emma Vanstone